This document discusses using different lenses or perspectives in systems thinking to gain a deeper understanding. It notes that there are many schools of systems thinking and lenses that can be used, but using a single lens may distort the view or truth. The best approach is to use multiple lenses to get a more well-rounded perspective and depth of vision. Certain combinations of lenses can provide extra insights. Reflecting on a system using the same lens twice can also help understand how one is perceiving the system.